# @Version : 1.0
# @Author : 刘皓

a = 10
b = 20
print(a and b)#20
print(a or b)#10
print(not (a and b))#False
#在python中，非0被视为真值,0值被视为假值

score = 70
print(score >= 60 and score <= 80)#True
if (score >= 60 and score <= 80):#成绩还不错
    print("成绩还不错")


a = 1
b = 99
print(a and b) #99
print((a > b) and b)#False
print((a < b) and b)#99
